Select the analysis options for Main Effects Plot

Stat > ANOVA > Main Effects Plot > Options
Minimum for Y (response) scale
Enter either a single scale minimum for all responses or one scale minimum for each response. If you enter more than one scale minimum, put a space between each value.
Maximum for Y (response) scale
Enter either a single scale maximum for all responses or one scale maximum for each response. If you enter more than one scale maximum, put a space between each value.
Title
Enter a custom title for the main effects plot.